<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<!DOCTYPE=html>
<html>
<head>
<script src="/js/jquery.min.js"></script>

   <script type="text/javascript">
    $(document).ready(function(){
        var range = 50;             //距下边界长度/单位px
        var elemt = 500;           //插入元素高度/单位px
        var maxnum = 20;            //设置加载最多次数
        var num = 1;
        var totalheight = 0;
        var main = $("#content");                     //主体元素
        $(window).scroll(function(){

            var srollPos = $(window).scrollTop();    //滚动条距顶部距离(页面超出窗口的高度)

              console.log("滚动条到顶部的垂直高度: "+$(document).scrollTop());
              console.log("页面的文档高度 ："+$(document).height());
              console.log('浏览器的高度：'+$(window).height());

            totalheight = parseFloat($(window).height()) + parseFloat(srollPos);
            if(($(document).height()-range) <= totalheight  && num != maxnum) {
                main.append("<div style='border:1px solid tomato;margin-top:20px;color:#ac"+(num%20)+(num%20)+";height:"+elemt+"' >hello world"+srollPos+"---"+num+"</div>");
                num++;
            }
        });
    });
    </script>
</head>
<body>
    <div id="content" style="height:960px">
        <div id="follow">this is a scroll test;<br/>    页面下拉自动加载内容</div>
        <div style='border:1px solid tomato;margin-top:20px;color:#ac1;height:800' >hello world test DIV</div>

    </div>
</body>
</html>